Marktest is leading in Top 10K Sites and Top 100K Sites.
WebProspector has better usage coverage in more websites categories. Including Business & Industry, Internet & Telecom, Marketing & Advertising, Computer & Electronics and 45 other categories.
Marktest is leading in Music & Audio, Newspapers and Soccer.
WebProspector is leading in most countries, including Germany, Grenada, Austria, Great Britain and 20 other countries.
Marktest is leading in Portugal, Brazil, Israel and Romania.